From: Mike Rapoport <rppt@kernel.org>
To: Kevin Brodsky <kevin.brodsky@arm.com>
Cc: Brendan Jackman <jackmanb@google.com>,
Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Andrew Morton <akpm@linux-foundation.org>,
David Hildenbrand <david@kernel.org>,
Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,
Vlastimil Babka <vbabka@kernel.org>, Wei Xu <weixugc@google.com>,
Johannes Weiner <hannes@cmpxchg.org>, Zi Yan <ziy@nvidia.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org, x86@kernel.org,
Sumit Garg <sumit.garg@oss.qualcomm.com>,
derkling@google.com, reijiw@google.com,
Will Deacon <will@kernel.org>,
rientjes@google.com, "Kalyazin, Nikita" <kalyazin@amazon.co.uk>,
patrick.roy@linux.dev, "Itazuri, Takahiro" <itazur@amazon.co.uk>,
Andy Lutomirski <luto@kernel.org>,
David Kaplan <david.kaplan@amd.com>,
Thomas Gleixner <tglx@kernel.org>,
Yosry Ahmed <yosry.ahmed@linux.dev>,
Ryan Roberts <ryan.roberts@arm.com>,
Rick Edgecombe <rick.p.edgecombe@intel.com>
Subject: Re: [PATCH RFC 00/19] mm: Add __GFP_UNMAPPED
Date: Fri, 6 Mar 2026 20:17:59 +0200 [thread overview]
Message-ID: <aasaV4N4tr9u5ONL@kernel.org> (raw)
In-Reply-To: <d6db1cc9-6df5-43d7-92b3-bd60707d9538@arm.com>
On Fri, Mar 06, 2026 at 01:31:15PM +0100, Kevin Brodsky wrote:
> On 05/03/2026 16:58, Brendan Jackman wrote:
>
> > Right, and actually just today someone pointed out mm/execmem.c to me, I
> > think execmem_cache_populate() is basically doing the same thing
> > (although it's also creating a separate virtual mapping).
>
> Ah interesting I didn't know about that cache. It does have
> similarities, and the motivation seems similar too.
The motivation for execmem cache is slightly different. The goal there was
to ensure kernel's executable memory (modules, kprobes, ftrace and
potentially BPF) is mapped at PMD level at vmalloc address space.
And the removal of the direct map alias for execmem is rather a side effect :)
But sure, there are similarities.
--
Sincerely yours,
Mike.
next prev parent reply other threads:[~2026-03-06 18:18 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-25 16:34 Brendan Jackman
2026-02-25 16:34 ` [PATCH RFC 01/19] x86/mm: split out preallocate_sub_pgd() Brendan Jackman
2026-02-25 16:34 ` [PATCH RFC 02/19] x86/mm: Generalize LDT remap into "mm-local region" Brendan Jackman
2026-02-25 16:34 ` [PATCH RFC 03/19] x86/tlb: Expose some flush function declarations to modules Brendan Jackman
2026-02-25 16:34 ` [PATCH RFC 04/19] x86/mm: introduce the mermap Brendan Jackman
2026-02-27 10:47 ` Brendan Jackman
2026-02-25 16:34 ` [PATCH RFC 05/19] mm: KUnit tests for " Brendan Jackman
2026-02-25 16:34 ` [PATCH RFC 06/19] mm: introduce for_each_free_list() Brendan Jackman
2026-02-25 16:34 ` [PATCH RFC 07/19] mm/page_alloc: don't overload migratetype in find_suitable_fallback() Brendan Jackman
2026-02-25 16:34 ` [PATCH RFC 08/19] mm: introduce freetype_t Brendan Jackman
2026-02-25 16:34 ` [PATCH RFC 09/19] mm: move migratetype definitions to freetype.h Brendan Jackman
2026-02-25 16:34 ` [PATCH RFC 10/19] mm: add definitions for allocating unmapped pages Brendan Jackman
2026-02-25 16:34 ` [PATCH RFC 11/19] mm: rejig pageblock mask definitions Brendan Jackman
2026-02-25 16:34 ` [PATCH RFC 12/19] mm: encode freetype flags in pageblock flags Brendan Jackman
2026-02-25 16:34 ` [PATCH RFC 13/19] mm/page_alloc: remove ifdefs from pindex helpers Brendan Jackman
2026-02-25 16:34 ` [PATCH RFC 14/19] mm/page_alloc: separate pcplists by freetype flags Brendan Jackman
2026-02-25 16:34 ` [PATCH RFC 15/19] mm/page_alloc: rename ALLOC_NON_BLOCK back to _HARDER Brendan Jackman
2026-02-25 16:34 ` [PATCH RFC 16/19] mm/page_alloc: introduce ALLOC_NOBLOCK Brendan Jackman
2026-02-25 16:34 ` [PATCH RFC 17/19] mm/page_alloc: implement __GFP_UNMAPPED allocations Brendan Jackman
2026-02-27 10:56 ` Brendan Jackman
2026-02-25 16:34 ` [PATCH RFC 18/19] mm/page_alloc: implement __GFP_UNMAPPED|__GFP_ZERO allocations Brendan Jackman
2026-02-27 11:04 ` Brendan Jackman
2026-02-25 16:34 ` [PATCH RFC 19/19] mm: Minimal KUnit tests for some new page_alloc logic Brendan Jackman
2026-03-02 15:36 ` [PATCH RFC 00/19] mm: Add __GFP_UNMAPPED Vlastimil Babka (SUSE)
2026-03-05 11:16 ` Brendan Jackman
2026-03-06 14:41 ` Borislav Petkov
2026-03-05 14:51 ` Kevin Brodsky
2026-03-05 15:58 ` Brendan Jackman
2026-03-06 12:31 ` Kevin Brodsky
2026-03-06 18:17 ` Mike Rapoport [this message]
2026-03-06 17:38 ` Edgecombe, Rick P
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